FASTENING DEVICE FOR SECURING A SECONDARY HEAT EXCHANGER OF THE SERPENTINE TYPE TO A MAIN HEAT EXCHANGER, AND HEAT EXCHANGER APPARATUS INCORPORATING SUCH A FASTENING DEVICE

摘要

The fastening device comprises at least one spacer which fits in a U-shaped bend of the serpentine tube of the secondary heat exchanger. The shape of this spacer is symmetrical about an axis of revolution and is adapted to fit in the U-shaped bend. The spacer also defines a fastening axis parallel to and offset from the axis of revolution, and is fixed to an associated anchor point on the main heat exchanger by a fastening means extending along this fastening axis. With this arrangement the angular orientation of the spacer about its fastening axis can be adjusted in order to compensate for any alignment errors between the U-shaped bend and the associated anchor point.